Hello! I’m Harold Da Costa Contreras, a Computer Engineer and Enterprise Solutions Architect with over 18 years of experience leading software development, designing scalable microservices, and delivering business-focused Java solutions. I enjoy mentoring teams, solving technically complex problems, and guiding projects from concept to production with a strong emphasis on quality, architecture, and delivery. I stay current with emerging tech and best practices, including AI prompting, security, and automation to drive reliable, high-performance products. In my work, I combine hands-on engineering with strategic leadership, collaborating closely with cross-functional teams and clients to align technology with business goals. I’m passionate about clean code, robust CI/CD pipelines, and building architectures that scale gracefully while minimizing footprint. I’m always eager to learn, share knowledge, and help teams reach their peak productivity.

Harold Da Costa Contreras

Hello! I’m Harold Da Costa Contreras, a Computer Engineer and Enterprise Solutions Architect with over 18 years of experience leading software development, designing scalable microservices, and delivering business-focused Java solutions. I enjoy mentoring teams, solving technically complex problems, and guiding projects from concept to production with a strong emphasis on quality, architecture, and delivery. I stay current with emerging tech and best practices, including AI prompting, security, and automation to drive reliable, high-performance products. In my work, I combine hands-on engineering with strategic leadership, collaborating closely with cross-functional teams and clients to align technology with business goals. I’m passionate about clean code, robust CI/CD pipelines, and building architectures that scale gracefully while minimizing footprint. I’m always eager to learn, share knowledge, and help teams reach their peak productivity.

Available to hire

Hello! I’m Harold Da Costa Contreras, a Computer Engineer and Enterprise Solutions Architect with over 18 years of experience leading software development, designing scalable microservices, and delivering business-focused Java solutions. I enjoy mentoring teams, solving technically complex problems, and guiding projects from concept to production with a strong emphasis on quality, architecture, and delivery. I stay current with emerging tech and best practices, including AI prompting, security, and automation to drive reliable, high-performance products.

In my work, I combine hands-on engineering with strategic leadership, collaborating closely with cross-functional teams and clients to align technology with business goals. I’m passionate about clean code, robust CI/CD pipelines, and building architectures that scale gracefully while minimizing footprint. I’m always eager to learn, share knowledge, and help teams reach their peak productivity.

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Experience Level

Expert
Expert
Expert
Expert
Expert

Language

Spanish; Castilian
Fluent
English
Advanced
Catalan; Valencian
Advanced

Work Experience

Tech Lead at Decathlon
June 1, 2022 - Present
Tech Lead for a squad of 10 developers to migrate and enhance applications for transport to/from Barcelona port; redefining the architecture based on Spring Boot to minimize footprint, improving deployment processes, mentoring team members, and ensuring high-quality software delivery within budget.
Architect at Parada Digital
June 1, 2021 - Present
Architect for VxL product, defining product architecture, modernizing microservices, documenting system design, and guiding migration strategies in line with business goals.
Tech Lead at HiC (Health in Code)
November 1, 2016 - April 1, 2018
Tech Lead in charge of product definition, architectural governance, and microservice ecosystem for healthcare software across Valencia and A Coruña; oversaw OAuth 2 security integration and REST API design.
Architect / Developer at GV18 Pro
March 1, 2012 - November 1, 2016
Architect/Developer for MedicalPro solution; managed registered client governance, real-time resource uploading to S3, and architectural components; implemented tokenization and API design.
Junior Web Developer at GIO SEG
October 1, 2003 - January 1, 2004
Junior Web Developer in charge of the view layer for a Java-based insurance web application using JSP/Struts/Hibernate; implemented MVC-oriented RESTful interfaces and UI components.

Education

Informatics Engineer at Instituto Politécnico Regional Capital Dr. Federico Rivera Palacio, Caracas, Venezuela
January 11, 2030 - January 1, 2011
Senior Technician in Computer Science at Instituto Técnico Superior Regional Capital Dr. Federico Rivera Palacio, Caracas, Venezuela
January 11, 2030 - January 1, 2004

Qualifications

Nomadix Router Services Training
January 11, 2030 - March 12, 2026
Windows Azure: Microsoft Cloud Platform
January 11, 2030 - March 12, 2026
Nomadix High Availability Router Training
January 11, 2030 - March 12, 2026

Industry Experience

Software & Internet, Healthcare, Financial Services, Professional Services, Media & Entertainment